unset_builtin.c

/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   unset_builtin.c                                    :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: mcombeau <mcombeau@student.42.fr>          +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2022/09/17 18:29:52 by mcombeau          #+#    #+#             */
/*   Updated: 2022/11/05 12:17:21 by mcombeau         ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "minishell.h"

/* unset_builtin:
*	Removes the environment variables with the given keys
*	after checking if they are valid keys.
*	Does nothing if the key is not in the environment.
*	Returns 0 if all args were successfully unset, or 1 if
*	one or more args could not be unset.
*/
int	unset_builtin(t_data *data, char **args)
{
	int	i;
	int	idx;
	int	ret;

	ret = EXIT_SUCCESS;
	i = 1;
	while (args[i])
	{
		if (!is_valid_env_var_key(args[i]) || ft_strchr(args[i], '=') != NULL)
		{
			errmsg_cmd("unset", args[i], "not a valid identifier", false);
			ret = EXIT_FAILURE;
		}
		else
		{
			idx = get_env_var_index(data->env, args[i]);
			if (idx != -1)
				remove_env_var(data, idx);
		}
		i++;
	}
	return (ret);
}